Function at back: Four different kinds of massage modes: knead, shiatsu, knock and knead-knock at the same time Six wheels driven at back which will be traveled up & down to massage your neck, shoulder, back and waist to keep relaxed. Vibration on the arm rest and airbags are set at the cushion, calf and feet rest which will make your body more relax The back can be lay down at the angle of 170 degree while the calf can be lift at the angle of 90 degree, if you sit on the chair and lift the calf to the top position, pull the feet rest by your feet to make the feet rest laid on the lever position which can massage the whole legs. LCD remote control which with the auto timing functions for 10. 20 and 30mins All the functions is controlled by the microcomputer Equipped the swivel wheels which can be flexible to remove the chair One carton for package: 115*80*76cm GW: 90KG NW: 78KG Power Supply: 110-120V or 220-240V, 50-60HZ, 180W